s_blend.h File Reference

#include "s_context.h"

Functions
void	_swrast_blend_span (GLcontext *ctx, struct gl_renderbuffer *rb, SWspan *span)
	Apply the blending operator to a span of pixels.
void	_swrast_choose_blend_func (GLcontext *ctx, GLenum chanType)
	Analyze current blending parameters to pick fastest blending function.

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Function Documentation

void _swrast_blend_span	(	GLcontext *	ctx,
		struct gl_renderbuffer *	rb,
		SWspan *	span
	)

Apply the blending operator to a span of pixels.

We can handle horizontal runs of pixels (spans) or arrays of x/y pixel coordinates.

void _swrast_choose_blend_func	(	GLcontext *	ctx,
		GLenum	chanType
	)

Analyze current blending parameters to pick fastest blending function.

Result: the ctx->Color.BlendFunc pointer is updated.

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